Robust Natural Language Parser

2. The method of claim 1, wherein the second metadata includes a sense of the phrase.

3. The method of claim 1, wherein the second metadata identifies the phrase as an idiom of the natural human language.

4. The method of claim 1, wherein at least two of the multiple constraints are nested constraints, such that a first constraint among the multiple constraints invokes processing, by the processor, of a second constraint among the multiple constraints.

5. The method of claim 4, and further comprising the second constraint invoking one of the first and second constraints in a recursive manner.

6. The method of claim 1, wherein the parsing includes determining that one of the multiple constraints is satisfied based on each word spelling in the phrase having a respective predetermined word type and having a constraint-specified position relative to other word spellings in the phrase.

11. The program product of claim 10, wherein the second metadata includes a sense of the phrase.

12. The program product of claim 10, wherein the second metadata identifies the phrase as an idiom of the natural human language.

13. The program product of claim 10, wherein at least two of the multiple constraints are nested constraints, such that a first constraint among the multiple constraints invokes processing, by the processor, of a second constraint among the multiple constraints.

14. The program product of claim 13, and further comprising the second constraint invoking one of the first and second constraints in a recursive manner.

15. The program product of claim 10, wherein the parsing includes determining that one of the multiple constraints is satisfied based on each word spelling in the phrase having a respective predetermined word type and having a constraint-specified position relative to other word spellings in the phrase.